MAGIC THERMAL CAPSULE INNER Inner Pants Bottoms Cold Protection Wetsuit Short Sleeve Type Used There is some pilling, but no noticeable damage. Size M Material Polyester 96% (Hollow Fiber 46%) / Polyurethane 4% Product Details ・Micro Thermal Capsules store heat released from the human body in the capsules, and when a certain temperature is reached, they dissolve and release heat. ・The heat retention effect of the Micro Thermal Capsules is kneaded into the fibers and is repeated. ・The technology of Micro Thermal Capsules used by NASA is used in the inner jersey.